Safety device



Nov 4 192B H. K. WEBSTER SAFETY DEVICE` Filed May 28,

1923 Sheets-Sheet 1 mig/ sign XNVENTOR ATTORNEY WITNESS:

NOV. 4

1,514,487 H. K. WEBSTER SAFETY DEVICE Filed May 28. 1923 Sheets-Sheet 2A1TORNEY WITNESS z Patented Nov. 4, 1924.

UNET

HENRY K. WEBSTER, 0F MADISONVILLE, KENTUCKY.

SAFETY Application filed May 28,

To all whom t may concern:

Be it known that I, HENRY K. WEBSTER, a citizen of the United States,residing at llladisonville, in the county of I-Iopkins and State vofKentucky, have invented new and useful Improvements in Safety Devices,of which the. following is a specification.

This invention relates to a safety device for elevators, the generalobject of the invention being to provide means for preventing theelevator from dropping if the hoisting cable should break.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure lis an elevation showing an elevator equipped with my invention.

Figure 2 is a section on line 2-2 of Figure l.

Figure 3 is a section on line 3-3 of Figure 2.

Figure 4 is a view showing the position of the parts when the cablebreaks.

Figures 5 and 6 are detail views.

In these views 1 indicates the elevator cage and 2 indicates theguideways for the same. 8 indicates the cross bar which engages theguideways and which is connected with the cage by the rods 4. A secondcross bar 5 is arranged below the bar 3 and this bar 5 has its endsengaging the guideways. A pair of dogs 6 are pivoted to the bar 5 and aspring 7 fastened to the upper part of the dogs tends to throw theirpointed lower ends outwardly against the guides and DEVICE.

1923. Serial No. 642,079.

thus prevent downward movement of the cage. The upper ends of the dogsare connected by the links 8 with the hoisting cable and rollers 10 onthe bar 3 engage the dogs.

From the foregoing it will be seen that the weight of the parts on thecable will hold the ends of the dogs out of engagement with theguideways so that the cage has free movement but if the cable shouldbreak the spring 7 will pull the upper ends of the dogs together andthus throw their lower ends into engagement with the guideways so thatthe cage is brought to rest and cannot fall. The weight of the cage willtend to cause the dogs to grip the guideways so that the greater theload the greater the grip the dogs will have upon the guideways.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

I desire it to 'be understood that I may make changes in theconstruction and in the combination and arrangement of the severalparts, provided that such changes fall within the scope of the appendedclaim.

What I claim is A safety devicepfor elevators comprising a cross barconnected with the top of the elevator and engaging the guideways, asecond cross bar below the first and engaging the guideways, dogspivoted to the second cross bar and having their upper ends eX- tendingthrough the first bar, means for connecting the hoisting cable with theupper ends of the dogs and spring means connecting thepupper ends kofthe dogs together and acting to throw their lower ends into engagementwith parts of the elevator shaft if the cable should break and rollerson the lirst cross bar for acting as stops for limiting the movement ofthe dogs.

In testimony whereof I aflX my signature,

HENRY K. WEBSTER.

